package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //微信接口服务地址
    public static final String openId_RequestAddress = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     *
     * @param userLoginDTO
     * @return
     */
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获取openId
        String openid = getOpenId(userLoginDTO.getCode());

        //判断openId是否为空
        if (openid == null || openid.isEmpty()) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否新用户,为新用户自动注册
        User user = userMapper.getByOpenId(openid);
        if (user == null) {
            user = User.builder().
                    openid(openid).
                    createTime(LocalDateTime.now()).
                    build();

            userMapper.insert(user);
        }
        return user;
    }

    /**
     * 调用微信接口服务，获取openId
     * @param code
     * @return
     */
    private String getOpenId(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(openId_RequestAddress, map);

        //解析openId
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }


}
